class base{

public:

virtual void display(){ cout << "base" << endl; }

};

class drive : private base{

public:

virtual void display(){ cout << "drive" << endl; }

};

int _tmain(int argc, _TCHAR* argv[])

{

//base* b = new drive; 　　　　//error

base* b = (base*)new drive; //right

b->display();　　　　　　　　//drive

}